Comparison of mixing Length parametrizations under different stability conditions in the nocturnal atmospheric boundary layer
Mixing length was introduced in the early 20th century to determine turbulent viscosity. Since then, various formulations have emerged, reflecting the complexity of parameterizing turbulent fluxes, especially under strongly stable conditions. This study proposes a new mixing length formulation based...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2024 |
| País: | Brasil |
| Institución: | Universidade Federal de Santa Maria (UFSM) |
| Repositorio: | Revista Ciência e Natura (Online) |
| Idioma: | portugués |
| OAI Identifier: | oai:ojs.pkp.sfu.ca:article/87948 |
| Acceso en línea: | https://periodicos.ufsm.br/cienciaenatura/article/view/87948 |
| Access Level: | acceso abierto |
| Palabra clave: | Turbulence Stable Boundary Layer Mixture Lenght Turbulência Camada Limite Estável Comprimento de Mistura |
| Sumario: | Mixing length was introduced in the early 20th century to determine turbulent viscosity. Since then, various formulations have emerged, reflecting the complexity of parameterizing turbulent fluxes, especially under strongly stable conditions. This study proposes a new mixing length formulation based on the dissipation of turbulent kinetic energy, avoiding autocorrelation issues. Results show the new formulation behaves consistently, decreasing with stability in weakly stable conditions and increasing in strongly stable conditions. Comparisons with other formulations indicate that this approach offers a more robust description of turbulence in the stable boundary layer (SBL). |
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